Sewing machine ventilating system



1932- N. v. CHRISTENSEN 1,344,743

SEWING MACHINE VENTILATING SYSTEM Filed Nov. 20, 1928 mew/ow 1 U'N,I,Tsstares Patented Feb. 9, 1932 eren OFFEQE a g NORMAN onnrsrnnsnn, o1\CHICAGO, ILLINOIS, ASSIGNOR To UNION SPECIAL MA- CHINE COMPANY, orQHIGAGO, ILLINOIS, A CORIORATION on ILLINOIS SEWING MACHINE 'VENTILATINGSYSTEM Application filed I Tovember 20, 1928. Serial No. 320,639.

The invention relates to new and useful improvements infsewing machinesand more particularly to aventilating system for sewing machines." J yhis well knownthat it is desirable to house the bearingsv and actuatingparts mounted therein in a sewing machine structureso as to prevent thelubriacting oil from coming in contact with thefmaterials.

An object of the invention is to provide a machine of the abovetypewithmeans for directing air currents through the housing for theactuating parts, which means is so constructed as to prevent any oilthrown by the actuating parts from escaping from the housmg.

In the drawings which show by way of illustration one embodiment of theinvention i Fig. 1 is a view partly in sectionand partly in frontelevation showing a sewing ma chine havlng the improved ventilatingsystem applied thereto.

Fig. 2 is a sectional View on the line 2--2 of Fig.1. 1

The invention is directed to a ventilating system for a sewing machinewhich includes a housing for the bearings and the actuating parts. Themachine is provided with a suitable bed carrying a standard having anoverhanging rocates. The main shaft in the present embodiment oi theinvention is mounted in the bed and an eccentric member carried therebyoperates through a link the needle lever. The bed, the standard, andoverhanging arm are hollow and the eccentric member, link,

. and needle lever are all mounted within this hollow housing or framestructure fior these actuating parts. The Wall of the standard near thebed is provided with an opening which is covered by a series of louversar ranged so that any oil thrown against the inner faces by theactuating parts will drain back into the housing. Adjacent the upper endthere is another opening which is like wise covered by a series oflouvers arranged in a similar manner so that any oil thrown againstthese members will drain back into the housing. I

arm in which the needle bar recip Referring more in detail to thedrawings, the machine as shown includes a supportin bed 1 carrying awork support 2. Mountec l on this bed is a standard 3 carrying anoverhanging arm 1 having a needle head 5 at the outer end thereof. Aneedle bar 6 reciprocates in the head 5) and carries needles 7, 7. V

The needle bar is oscillated by a lever 8 pivoted at 9 and connected bya link 10 with a lug attached to the needle bar. Mounted in thebed 1 isthe main actuating shaft 11. Said main actuating shaft is shown asprovided with a crank 12. This shaft is mount ed in a bearing-sleeve 13and also other bear-- ings carried by thebed, one of which is indicatedat 14.

Cooperating with the crank 12 is a link 15 and this link 15 is connectedto a ball stud at theend ofthe actuating lever 8. The bed, the standard,and the overhanging arm are all hollow and the needle lever and theactuating parts therefor are all mounted within these hollow parts.

Oil is supplied to the connection between the link and the needle leverand also the connection between the link and the crank by means ofan oilreservoir 16. A pipe 17 leading from the oil reservoir carries a wickingfrom which oil is supplied to the connection between the link15 and theball stud on the end of the needle lever 8. A pipe 18 with a wickingtherein leads from the reservoir and delivers oil to an opening at theupper end of the link which finds its way down through the link to thecrank connection 12. This lubricating means forms no part of the presentinvention, but is shown, described, and claimed in the application filedby Frederick F. Zeiery filed August 2, 1928,-Serial Number 297,053. r I

Any oil working out of the parts which are lubricated and also out ofthebearings for the main actuating shaft will gather at the bottom ofthe well in the bed, and will bekept from contactwith the material. Theactuating parts being completely housed may throw oil against the innerwalls of the housing, but this lubricatingoil will remain on the insideof the housing and thus the material being operated upon is protected.

lVhere all of the actuating parts are within a housing and the machineis driven at high speeds, there is a tendency, of course, for themovable parts to become heated to a certain extent. The presentinvention has particularly to do with means for air cooling the movableactuating parts of the machine without permitting any of the lubricatingoil to escape from the housing.

To this end, the standard 3 at the front face thereof is provided withan opening 19 (see Fig. 2). This opening is covered by a frame member 20which is secured to the outer wall of the standard by means of suitablescrews 21, 21. The covering frame 20 is provided with a series oflouvers 22. These louvers an preferably formed integral with the framestructure and extend horizontally across the frame structure. The innerface 23 of each louver inclines inwardly and downwardly, while the upperface 2a is substantially-horizontal. These louvers are spaced so as toprovide openings leadfnginto the housing of the standard. V

At a point higher up on thestandard housing structure there is anotheropening 25 and this opening is covered by a frame 26 similar to theframe 20 and provided with louvers 27, the inner faces of which inclinedownwardly and the edges of which are substantially horizontal. Thismakes a series of passages extending through the wall of the housing.During the operation of the machine the link, the crank, and the leverare all vibrating at a very high speed. These vibrating parts will setup a circulation of air to a certain extent within the housing.Furthermore, the heated air rising in the housing will escape throughthe louvers 27 near the upper end of the housing while cool air is drawnin through the louvers 24: near the lower end of the standard orhousing. The movement of the parts within the housing throws a certainamount of oil and it is possible that oil will be splashed somewhat bythe crank in the bed. Any oil thrown by the actuating parts, however,against the louvers will strike the inclined faces thereof which inclinedownwardly and inwardly and will drain back into the housing.

It will. be apparent from the above description that I have provided avery eflicient means for air cooling the actuating parts of a sewingmachine without permitting the oil thrown by the actuating parts toescape through the ventilating openings.

It will be understood, of course, that the entilating system as shown inthe drawings,

- is indicated as applied to the machine at the standard and directlyabove the main hear ing for the actuating shaft. It may be otherwiseused in sewing machines and the details Of construction of theventilating louvers may be widely varied without departing from thespirit of the invention as set forth in the appended claims.

Having fully described my invention, what I claim as new and desire tosecure by Letters Patent, is

1. In a sewing machine the combination of a hollow housing havingactuating parts therein, said housing having openings through whichcooling air currents may be passed into, through, and out of thehonsing, a d f ame membe hav ng lo v r W their inner faces inclininginwardly and downwardly for covering said openings.

2. In a sewing machine, the combination of a hollow housing havingactuating parts therein, said housing having an opening through whichcooling air currents may pass into, through and out of the hoi sing, andlouvers extending horizontally across opening and inclining inwardly anddownwardly for covering the opening so as to prevent the escape oflubricating oil from the housing through the opening,

In testimony whereof, Ialfix my signature.

NORMAN V. CHRISTENSEN.

